我在堆栈溢出的三个活动中搜索了关于android意图的所有问题，但不幸的是没有我所面临的预期场合，第一个活动包括一个简单的按钮，但它没关系，通过该活动我通过了数据到第二个活动，我想点击textView（一个按钮）并将一些数据传递给第三个活动，总计划太长，这里是片段：
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.btn_search:
Intent third = new Intent(this, ThirdActivity.class);
startActivity(third);
break;
default:
break;
}
}
我期望的是单击按钮并跳转到第三个活动，但实际上每次点击它回到第一个活动，我很好奇，如果我不能在第二个活动中使用意图？但我认为这是荒谬的。有没有关于这个问题的建议。 更新：这里是全班但有很多空实现，而SDK是高德地图，所以不关心总逻辑，只关注onclick事件：
public class AroundSearchActivity extends Activity implements AMap.OnMapClickListener,
AMap.OnMarkerClickListener, AMap.OnInfoWindowClickListener, AMap.InfoWindowAdapter,
View.OnClickListener, PoiSearch.OnPoiSearchListener, LocationSource, AMapLocationListener
{
private AMap map;
private MapView mapView;
private AMapLocation mapLocation;
private AMapLocationClient mapLocationClient;
private AMapLocationClientOption mapLocationClientOption;
private OnLocationChangedListener locationChangedListener;
private double latitude;
private double longitude;
private double previousLatitude = 0;
private Marker currentMarker;
private RelativeLayout detail;
private TextView name;
private TextView address;
private EditText input_text;
private PoiSearch poiSearch;
private PoiSearch.Query query;
private PoiResult result;
private ArrayList<PoiItem> poiItems;
private Marker mLastMarker;
private Marker detailMarker;
private MyPoiOverlay poiOverlay;
private String searchStr;
private int[] showMarkers = {
R.drawable.poi_marker_1,R.drawable.poi_marker_2,R.drawable.poi_marker_3,R.drawable.poi_marker_4,R.drawable.poi_marker_5,
R.drawable.poi_marker_6,R.drawable.poi_marker_7,R.drawable.poi_marker_8,R.drawable.poi_marker_9,R.drawable.poi_marker_10,
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.poiaroundsearch_activity);
mapView = (MapView) findViewById(R.id.mapView);
mapView.onCreate(savedInstanceState);
init();
}
public void init(){
if (map == null){
map = mapView.getMap();
}
setUpMap();
map.setOnMapClickListener(this);
map.setOnMarkerClickListener(this);
map.setOnInfoWindowClickListener(this);
map.setInfoWindowAdapter(this);
TextView search = (TextView) findViewById(R.id.btn_search);
search.setOnClickListener(this);
setup();
}
public void setup(){
detail = (RelativeLayout) findViewById(R.id.poi_detail);
detail.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
//toggle detail click event
Toast.makeText(AroundSearchActivity.this, "hello", Toast.LENGTH_SHORT).show();
}
});
name = (TextView) findViewById(R.id.poi_name);
address = (TextView) findViewById(R.id.poi_address);
input_text = (EditText) findViewById(R.id.input_edittext);
}
@Override
protected void onResume() {
super.onResume();
mapView.onResume();
searchMap();
}
@Override
protected void onPause() {
super.onPause();
mapView.onDestroy();
deactivate();
}
public void setUpMap(){
map.setLocationSource(this);
map.getUiSettings().setMyLocationButtonEnabled(true);
map.setMyLocationEnabled(true);
map.setMyLocationType(AMap.LOCATION_TYPE_LOCATE);
}
@Override
protected void onDestroy() {
super.onDestroy();
locationChangedListener = null;
if (mapLocationClient != null){
mapLocationClient.stopLocation();
mapLocationClient.onDestroy();
}
mapLocationClient = null;
}
@Override
public void onLocationChanged(AMapLocation aMapLocation) {
if (locationChangedListener != null && aMapLocation != null){
if(aMapLocation.getErrorCode() == 0){
latitude = aMapLocation.getLatitude();
longitude = aMapLocation.getLongitude();
locationChangedListener.onLocationChanged(aMapLocation);
Log.i("CurrentLocation", "latitude is " + latitude + " ,longitude is:" + longitude);//get current latitude and longitude
if (currentMarker != null) currentMarker = null;
currentMarker = map.addMarker(new MarkerOptions().
position(new LatLng(latitude, longitude))
.icon(null)
.draggable(true));
currentMarker.showInfoWindow();
map.moveCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(latitude, longitude), 16));
if (previousLatitude == 0){
searchMap();
}else{
String pre = String.valueOf(previousLatitude);
String a = pre.substring(pre.indexOf(".") + 1, pre.indexOf(".") + 4);
String cur = String.valueOf(latitude);
String b = cur.substring(cur.indexOf(".") + 1, cur.indexOf(".") + 4);
if (!a.equals(b)){
searchMap();
}
}
previousLatitude = latitude;
}else{
int errorCode = aMapLocation.getErrorCode();
Toast.makeText(this, "定位失败:"+errorCode, Toast.LENGTH_SHORT);
}
}
}
@Override
public View getInfoWindow(Marker marker) {
return null;
}
@Override
public View getInfoContents(Marker marker) {
return null;
}
@Override
public void activate(OnLocationChangedListener onLocationChangedListener) {
locationChangedListener = onLocationChangedListener;
if (mapLocationClient == null){
mapLocationClient = new AMapLocationClient(this);
mapLocationClientOption = new AMapLocationClientOption();
mapLocationClient.setLocationListener(this);mapLocationClientOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);
mapLocationClient.setLocationOption(mapLocationClientOption);
mapLocationClient.startLocation();
}
}
@Override
public void deactivate() {
locationChangedListener = null;
if (mapLocationClient != null){
mapLocationClient.stopLocation();
mapLocationClient.onDestroy();
}
mapLocationClient = null;
}
@Override
public void onClick(View view) {
switch (view.getId()){
case R.id.btn_search:
Intent third = new Intent(this, ThirdActivity.class);
startActivity(third);
break;
default:
break;
}
}
@Override
public void onInfoWindowClick(Marker marker) {
}
@Override
public void onMapClick(LatLng latLng) {
whetherToShowInfo(false);
if (mLastMarker != null){
resetLastMarker();
}
}
@Override
public boolean onMarkerClick(Marker marker) {
if (marker.getObject() != null){
//whether to show the marker detail information
whetherToShowInfo(true);
//get the current location
PoiItem currentItem = (PoiItem) marker.getObject();
//aim at the next marker and preserve the current marker
if (mLastMarker == null){
mLastMarker = marker;
}else {
resetLastMarker();
mLastMarker = marker;
}
detailMarker = marker;
detailMarker.setIcon(BitmapDescriptorFactory.fromResource(R.drawable.poi_marker_pressed));
setPoiMarkerContent(currentItem);
}else {
whetherToShowInfo(false);
resetLastMarker();
}
return true;
}
@Override
public void onPoiSearched(PoiResult poiResult, int errorCode) {
if (errorCode == 1000){
if (poiResult != null && poiResult.getQuery() != null){
if (poiResult.getQuery().equals(query)){//判断是不是同一组查询
result = poiResult;//将搜索结果赋值给result
poiItems = result.getPois();
//列出所有poi搜索结果
for (int i = 0; i < poiItems.size(); i++){
Log.i("result"+i, poiItems.get(i).getSnippet());
}
List<SuggestionCity> suggestionCities = result.getSearchSuggestionCitys();
if (poiItems != null && poiItems.size() > 0){
whetherToShowInfo(false);
if (mLastMarker != null) {
resetLastMarker();
}
if (poiOverlay != null){
poiOverlay.removeFromMap();
}
map.clear();
poiOverlay = new MyPoiOverlay(this, map, poiItems);
poiOverlay.addToMap();
poiOverlay.zoomToSpan();//move to the current scene
map.addMarker(new MarkerOptions().anchor(0.5f, 0.5f)
.icon(BitmapDescriptorFactory.fromResource(R.drawable.point4))
.draggable(false)
.position(new LatLng(latitude, longitude)));
}else{
if (suggestionCities != null && suggestionCities.size() > 0){
showSuggestCity(suggestionCities);
}
}
}
}else {
Toast.makeText(this, "Sorry! No result match your request", Toast.LENGTH_SHORT).show();
}
}else {
Log.e("errorInfo", "Search failed:" + errorCode);
}
}
@Override
public void onPoiItemSearched(PoiItem poiItem, int i) {
}
public void whetherToShowInfo(boolean w){
if (w){
detail.setVisibility(View.VISIBLE);
}else{
detail.setVisibility(View.GONE);
}
}
public void resetLastMarker(){
int index = poiOverlay.getPoiIndex(mLastMarker);
if (index < 10){
mLastMarker.setIcon(BitmapDescriptorFactory.fromBitmap(BitmapFactory.decodeResource(getResources(), showMarkers[index])));
}else{
mLastMarker.setIcon(BitmapDescriptorFactory.fromBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.marker_other_highlight)));
}
mLastMarker = null;
}
public void showSuggestCity(List<SuggestionCity> suggestionCities){
String information = "City information/n";
for (int i = 0; i < suggestionCities.size(); i++){
information += "City name" + suggestionCities.get(i).getCityName() +
", City administrative code::" + suggestionCities.get(i).getAdCode();
}
Toast.makeText(this, information, Toast.LENGTH_SHORT);
}
public void searchMap(){
Toast.makeText(this, searchStr, Toast.LENGTH_SHORT).show();
Intent intent = getIntent();
searchStr = intent.getStringExtra("keyword");
int currentPage = 0;
query = new PoiSearch.Query(searchStr.trim(), "", "Beijing");
query.setPageSize(20);
query.setPageNum(currentPage);
LatLonPoint lp = new LatLonPoint(latitude, longitude);
if (lp != null){
poiSearch = new PoiSearch(this, query);
poiSearch.setOnPoiSearchListener(this);
poiSearch.setBound(new PoiSearch.SearchBound(lp, 2000, true));
poiSearch.searchPOIAsyn();
}
}
public void setPoiMarkerContent(PoiItem item){
name.setText(item.getTitle());
address.setText(item.getSnippet());
}
}